Fastmail web interface easily beats the native Apple email apps for features. Search is very fast, and it’s easy to isolate chains out of a 15 year deep pile.
I’ve had a paid subscription to Fastmail for 10+ years. After thinking that email was not worth paying for. It’s that good.
How does Fastmail do with spam filtering?
Not as good as Google's :(.
Google's spam filtering can be a bit too good.
Going on two years with fastmail, I get zero spam. I'd say its good enough.